EP0427490A2 - Disk drive apparatus - Google Patents
Disk drive apparatus Download PDFInfo
- Publication number
- EP0427490A2 EP0427490A2 EP90312087A EP90312087A EP0427490A2 EP 0427490 A2 EP0427490 A2 EP 0427490A2 EP 90312087 A EP90312087 A EP 90312087A EP 90312087 A EP90312087 A EP 90312087A EP 0427490 A2 EP0427490 A2 EP 0427490A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- printed circuit
- transducer
- circuit board
- disk drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
- G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1446—Reducing contamination, e.g. by dust, debris
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1446—Reducing contamination, e.g. by dust, debris
- G11B33/1453—Reducing contamination, e.g. by dust, debris by moisture
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1493—Electro-Magnetic Interference [EMI] or Radio Frequency Interference [RFI] shielding; grounding of static charges
Landscapes
- Moving Of Heads (AREA)
- Rotational Drive Of Disk (AREA)
- Automatic Disk Changers (AREA)
Abstract
Description
- The present invention relates to a disk drive apparatus for providing information storage in a computer system.
- Mini-computer systems and main-frame computer systems typically employ disk drives for mass information storage. Generally, such systems are not portable and are housed in large rooms having controlled environments. Consequently, the weight and space occupied by such systems are of little concern. Recently, however, the advent of personal computer systems and portable computer systems has placed a premium on providing disk drives of reduced size and weight. Exemplary of such a disk drive is U.S. Patent No. 4,712,416 which issued on December 8, 1987, to Moon et al. for a "Thin and Compact Micro-Winchester Head and Disk Assembly". The invention of Moon et al., includes a housing for containing a 95mm hard disk that provides at least ten megabytes of storage, a spindle motor for rotating the hard disk and a rotary actuator assembly for moving transducers relative to the hard disk. The disk drive is 171.5mm (6.75") in length, 101.6mm (4") in width and has a height of 25.4mm (1") exclusive of a printed circuit board. Also known is the disk drive disclosed in International Application WO 88/09551, which was published on December 1, 1988, and is entitled "Disk Drive Architecture". Disclosed is a disk drive apparatus that includes a base-plate that provides a mounting surface for a spindle motor that rotates a 88.9mm (3.5") hard disk and a rotary actuator assembly that moves transducers relative to the hard disk. The base-plate is attached to an end-plate. The baseplate/end-plate assembly fits into, and establishes a seal with, an open-ended casing. A unitized frame attaches the end-plate/casing assembly to a printed circuit board and provides shock absorbing capability. The disk drive is 146.1mm (5.75") in length, 101.6mm (4") in width and has a height of 38.1mm (1.5"). Conner Peripherals also produces a low-profile disk drive which is approximately 146.1mm (5.75") x (101.6mm (4") x 25.4mm (1"). Also known is the
Model 220 disk drive produced by the assignee of the present invention and the subject: of U.S. Patent Application 07/162,799 and International Application WO 89/08313, which are incorporated herein by reference. Themodel 220 disk drive includes a housing for containing two hard disks with each providing an information storage capacity of 5-10 MBytes, a spin motor for rotating the hard disks, transducers for communicating with the hard disk, and a rotary actuator for moving the transducers relative to the hard disks. A printed circuit board having circuitry for controlling various components of the disk drive and the housing are attached to one another in a stacked relationship that results in an overall length of 109.2mm (4.30"), a width of 71.1mm (2.80") and a height of 25.4mm (1.00") for the disk drive including the printed circuit board. - Of importance in achieving a reduced height dimension is the height of the components contained within the disk drive housing and especially the height of the spin or spindle motor that rotates the hard disk(s). Presently, spin motors have heights on the order of 15.2mm (0.6"). Exemplary of such a spin motor is the
aforementioned Model 220 disk drive produced by the assignee of the present invention. - Also of importance in attaining a low profile disk drive is the height profile of the rotary actuator. The rotary actuator disclosed in the aforementioned patent to Moon et el., includes a triangular electromagnetic voice coil surrounded by upper and lower magnets. Surrounding the upper and lower magnets are flux return plates that are attached to the housing and constrain the magnetic fields produced by the magnets to a gap area between the magnets as well as prevent the magnetic fields produced by the magnets and the voice coil from affecting the hard disk(s). Consequently, the height of at least a portion of the rotary actuator is defined by two flux return plates, two sets of magnets and a voice coil. The Model 220 disk drive uses a similar arrangement. The rotary actuator used in the disk drive disclosed in International Application WO 88/09551 includes an electromagnetic voice coil that surrounds a center pole. The center pole cooperates with a base plate and a top plate located below and above, respectively, of the electromagnetic voice coil to provide flux return paths. Consequently, the height of the rotary actuator is determined by the voice coil, the center pole and the top and bottom plates. Also known are linear voice coil actuators that have a housing that provides a surface for attaching the actuator to the disk drive housing. The actuator housing provides a flux return path as well as prevents the entry of contaminants into the disk drive housing.
- Of related interest in producing a disk drive of reduced height is the attachment to the housing of a printed circuit board having electronics for controlling one or more of the components of the disk drive . The U.S. Patent No. 4,712,416 to Moon et al., discloses a printed circuit board having electronics for controlling the multiple windings of the spindle motor. To attain a low profile disk drive, the printed circuit board is located in a recess located on the exterior of the baseplate and adjacent the spindle motor. Apparently, the circuitry for controlling other aspects of the disk drive, like read/write control and actuator servo control, are located on another printed circuit board. The International Application WO 88/09551 illustrates a printed circuit board that is attached to the casing by a frame and provides electronics for controlling the hardware housed within the casing. The portion of the casing facing the printed circuit board appears to be devoid of any recesses. Consequently, the printed circuit board must be spaced from the casing by a distance greater than the highest profile component on the side of the printed circuit board facing the casing. The Model 220 disk drive piggybacks the disk drive housing on the printed circuit board. The portion of the housing facing the printed circuit board includes a first level defined by the spin motor and the rotary actuator, a second level recessed from the first level and a third level recessed from the second level. Electronic components are located on the side of the circuit board facing the housing to take advantage of the recesses defined by the second level. A connector for establishing a communication link between the electronics on the circuit board and a flexible circuit that extends into the housing and communicates with components contained therein is located on the side of the circuit board facing the housing and utilizes the recess defined by the third level.
- Another important aspect associated with disk drives employed in personal and/or portable computer systems is the frame used to attach the housing and/or printed circuit board to the user's computer system. The Model 220 disk drive does not use a frame. Instead, the Model 220 uses the printed circuit board to bottom mount the disk drive to the user's computer system as well as support the housing. The light weight of the housing and the components contained therein makes such an arrangement possible. While such a configuration reduces cost, saves space and reduces the overall size of the disk drive, it lacks shock absorbing capability, has grounding problems and does not accommodate other mounting configurations. The frame of the disk drive disclosed in International Application WO 88/09551 supports both the printed circuit board and the housing. The frame also provides side and bottom mounting capability together with shock absorbing capability. However, the frame has a surface area that requires grounding and does not provide top mounting capability.
- The disk drive produced by Conner Peripherals employs a housing having a base-plate with two side rails that provide side and bottom mounting capability.
- An important factor affecting the performances of disk drives is the entry of contaminates, such as dirt or dust or moisture, into the housing. Presently, disk drives use ambient or breather filters to prevent the entry of contaminants, like dust and dirt, into the interior of the housing. Exemplary of such filters are the ones employed in the Model 220 disk drive and the disk drive disclosed in the patent to Moon et al. While ambient or breather filters inhibit the entry of dust and dirt into the interior of the disk drive housing, they are ineffective at inhibiting the entry of water vapor. Consequently, desiccants contained within boxlike structures have been placed in the interior of the housing to adsorb water vapor contained therein. The
Model 220 disk drive uses a desiccant contained within a box-like structure. While a relatively large amount of desiccant can be provided in this way, the use of boxlike structures creates longer diffusion paths, i.e. the distance a water molecule must travel upon entering boxlike structures before adsorption occurs. The longer adsorption paths, in turn, reduce the rate of adsorption of the desiccant. - Also of importance to the operation of a disk drive is the effect that the flexible circuit used to communicate with a rotary actuator and/or transducers attached to the rotary actuator has on the rotary actuator. Typically, flexible circuits exert a force or torque on the rotary actuator. This torque affects the position of the transducers or heads relative to the disk. The disk drive apparatus disclosed in the International Application WO 88/09551 reduces this effect of the flexible circuit on the rotary actuator by using a flexible circuit with as large a radius of curvature as possible. The Model 220 disk drive imposes a double-curve on the flexible circuit to reduce its effect on the rotary actuator.
- It is an object of the present invention to provide disk drive apparatus.
- In accordance with the present invention there is provided disk drive apparatus, comprising:
a hard disk;
a spin motor for rotating said hard disk;
a transducer for communicating with said hard disk;
a rotary actuator for moving said transducer relative to said disk, said rotary actuator including a pivot capstan and a voice coil assembly;
a housing for containing said hard disk, said spin motor, said transducer and said rotary actuator in an interior thereof, said housing having an exterior surface, an interior surface, a first top side and a first bottom side;
a printed circuit board having a second top side and a second bottom side;
electronic means for controlling at least one of the following: said spin motor, said transducer and said rotary actuator, said electronic means including a first component of a first height and a second component of a second. height greater than said first height, said first and second components located on said first side of said printed circuit board; and
frame means for connecting said housing to said printed circuit board in a stacked relationship where said first bottom side of said housing faces said second top side of said printed circuit board;
wherein a first cross-section of said disk drive apparatus includes said first top side of said housing, one of the following: said spin motor and said pivot capstan, and said printed circuit board, wherein said first cross-section is no greater than approximately 16.0mm (0.630 inch) in height;
wherein a second cross-section of said disk drive apparatus includes said first top side of said housing, said voice coil assembly, said first bottom side of said housing, said first component and said printed circuit board, wherein said second cross-section is no greater than approximately 16.0mm (0.630 inch) in height;
wherein a third cross-section of said disk drive apparatus includes said first top side of said housing, said hard disk, said first bottom side of said housing, said second component and said printed circuit board, wherein said third cross-section is no greater than approximately 16.0mm (0.630 inch) in height. - The present invention provides a disk drive apparatus that is especially suitable for use with computer systems where size and weight are of paranount concern. The preferred embodiment of the disk drive apparatus includes a 63.5mm (2.5") hard disk that preferably provides 20 to 40 megabytes of information storage. The disk drive apparatus further includes a spin motor for rotating the hard disk, one or more transducers for communicating with the hard disk, and a rotary actuator for moving the transducers relative to the hard disk. The aforementioned components are contained within a housing that is approximately 101.6mm (4.00 inches) by 69.9mm (2.75 inches). The housing provides, among other things, a protected environment in which the aforementioned components can operate. Also included in the preferred embodiment of the disk drive apparatus is a printed circuit board on which electronic circuitry for controlling one or more of the components contained within the housing is established. The printed circuit board is also approximately 101.6mm (4 inches) in length by approximately 69.9mm (2.75 inches) in width. A frame assembly is employed to attach the housing to the printed circuit board in a stacked or piggyback manner. Due to the stacked relationship between the housing and the printed circuit board established by the frame assembly, the disk drive apparatus has an overall footprint of approximately 101.6mm (4.0 inches) in length by approximately 71.1mm (2.8 inches) in width. This constitutes a reduction in length over the
Model 220 disk drive produced by the assignee of the present invention which has a footprint with a length of about 109.2mm (4.3 inches).
or low height disk drive apparatus. The height of the disk drive apparatus is, at least in part, determined by the height of the housing. The height of the housing, in turn, is determined by the height of the spin motor. The present invention provides a spin motor having a height of approximately 8.9mm (0.35 inch} which is much less than the presently known spin motors which have heights of approximately 15.2mm (0.6 inch). The low profile spin motor of the present invention is realized by using a magnetic material that includes a rare earth, such as neodymium or samarium, to increase the operating flux level and therefore reduce the height of the magnets within the rotor portion of the spin motor while still maintaining adequate performance characteristics. - Another factor affecting the height of the disk drive apparatus is the various heights of the electronic components established on the printed circuit board. For instance, if all of the components are located on the side of the printed circuit board facing away from the housing, then the overall height of the disk drive apparatus will be determined by the component with the greatest height. The present invention avoids this problem by recessing the side of the housing that faces the printed circuit board and placing the components of greatest height on the side of the circuit board facing the housing so as to take advantage of the recesses. The ability to recess the housing is determined, at least in part, by the height dimension of the rotary actuator contained within the housing. T h e p re sent invention provides a low profile rotary actuator that allows the housing to be recessed to an extent that allows components having a height of 1.27mm (0.050") to be accommodated. While these are not the highest profile components, placement of these components on the side of the printed circuit board facing the housing, as opposed to the other side of the printed circuit board, results in a printed circuit board having a footprint of approximately 101.6mm (4.00") by approximately 69.9mm (2.75"). The low profile rotary actuator is achieved using a voice coil assembly that employs the housing as a magnetic flux return path for the magnetic fields created by the voice coil assembly. Consequently, the housing serves the following three purposes: (1) to protect or shield the components contained therein from the ambient atmosphere; (2) to provide a mounting surface for the spin motor and the rotary actuator; and (3) to act as a magnetic flux return path for magnetic fields produced by the voice coil assembly. By using the housing for all of these purposes, rather than providing separate elements to achieve all of these purposes, the present invention realizes a low profile rotary actuator. A further recess can be created in the housing so that components of a height of 3.23mm (0.127") can be accommodated. This further recess is determined by the distance from the spin motor mounting flange to the bottom surface of the hard disk. Use of the recesses, as determined by the height of the low profile rotary actuator and the distance from the spin motor mounting flange to the bottom of the hard disk, to accommodate components located on the side of the printed circuit board facing the housing results, in the preferred embodiment of the invention, in a disk drive having a height dimension of approximately 1.5mm (0.6").
- Also provided by the present invention is a frame assembly for connecting the housing to the printed circuit board that does not require grounding, is low weight, and provides flexible mounting capability. The frame assembly, unlike frames previously employed in disk drive apparatus, is distributed. Specifically, the frame assembly in the preferred embodiment of the invention includes two separate but identical assemblies that attach the four corners of the housing to the four corners of the printed circuit board. The total surface area of the distributed frame is small enough, preferably less than five percent of the surface area of the housing, to not require grounding. In addition, the distributed frame assembly is extremely lightweight. Moreover, one embodiment of the frame assembly provides the capability to either top, bottom or side mount the disk drive to the user's computer system.
- Also provided by the present invention is an ambient filter assembly that inhibits the entry of water vapor from the ambient atmosphere into the housing where it can adversely affect the operation of the disk drive apparatus. The ambient filter assembly inhibits entry of water vapor into the interior of the housing, in contrast to known ambient filters, by employing a hole between the ambient and the interior of the disk drive that creates a resistance to the entry of water vapor into the housing. The resistance is created by establishing a hole having a relatively long length and/or a relatively small diameter. Preferably, the hole has a helical or serpentine shape.
- The present invention also provide an improved desiccant to adsorb moisture within the housing of the disk drive apparatus. Desiccants previously employed in the interiors of disk drive housings are typically in box-like structures that effectively reduce the adsorption rate of the desiccant. The present invention provides a compartment located between the exterior and interior surfaces of the housing to house a large, planar desiccant. The compartment is in communication with the interior of the housing. The large surface area of the planar desiccant results in an improved rate of adsorption.
- Further provided by the invention is a flex circuit geometry that results in the flex circuit applying substantially zero torque to the rotary actuator.
- By way of example only, specific embodiments of the present invention will now be described with reference to the accompanying drawings, in which:-
- Fig. 1 is a perspective view of a preferred embodiment of the disk drive apparatus with the cover portion of the housing illustrated in ghost lines to allow illustration of the components contained within the housing in accordance with the present invention,
- Fig. 2 is a perspective view of the preferred embodiment of the disk drive apparatus with the cover portion removed;
- Fig. 3 is an exploded perspective view of the preferred embodiment of the disk drive apparatus;
- Fig. 4A is a cross-sectional view of the preferred embodiment of the disk drive apparatus that illustrates the relationship of various components of the disk drive apparatus necessary to achieve a height dimension of 1.52mm (0.6 inch).
- Fig. 4B is an exploded cross-sectional view of the preferred embodiment of the disk drive apparatus that illustrates the relationship of various components of the disk drive apparatus necessary to achieve a height dimension of 1.52 (0.6 inch):
- Fig. 5 is a detailed cross-sectional view of the frame assembly used to connect the housing portion to the printed circuit board in the preferred embodiment of the disk drive apparatus;
- Fig. 6 is a map of the various areas on the top side of the printed circuit board where components having heights of 1.27mm (0.050 inch) and 3.23mm (0.127 inch) are located together with the areas where no components are located in the preferred embodiment of the disk drive apparatus;
- Fig. 7 is a top, cutaway view of the spin motor illustrating the substantially planar neodymium-boroniron magnets used to achieve a reduced height dimension for the spin motor;
- Fig. 8 is a cross-sectional view of the spin motor employed in the preferred embodiment of the disk drive apparatus to rotate the hard disk;
- Fig. 9 is a cross-sectional view of the voice coil assembly portion of the rotary actuator illustrating the use of the housing to provide a magnetic flux return path;
- Fig. 10 is a detailed view of the construction of the ambient air filter assembly that reduces the penetration of water vapor from the ambient atmosphere into the interior of the housing in the preferred embodiment of the disk drive apparatus;
- Fig. 11 illustrates the geometry of the flex circuit used to reduce the torque or force on the rotary actuator produced by the flex circuit;
- Figs 12A is a top view of an alternative embodiment of the distributed frame system and the baseplate;
- Figs. 12B and 12C are top and side views, respectively, of one of two identical side members included in the alternative embodiment of the distributed frame system; and
- Fig. 12D is a detailed view of the connective structure between a corner of the housing and the printed circuit board in the alternative embodiment of the distributed frame system;
- Fig. 13 is an alternative embodiment of the ambient air filter assembly that reduces the penetration of water vapor from the ambient atmosphere into the interior of the housing.
- The preferred embodiment of the present invention provides a disk drive apparatus having dimensional characteristics that make it particularly useful in portable computer systems or computer systems where space or volume is a primary concern. Of particular importance is the height dimension of the disk drive apparatus which is achieved by, among other things, reducing the height of the spin motor. By reducing the height of other components, such as the rotary actuator, contained within the housing of the disk drive apparatus a recessed exterior can be realized. The housing is piggy-backed on a printed circuit board that has the electronics for controlling various components of the disk drive apparatus contained within the housing. To attain a low-profile disk drive, high profile electronic components are established on the side of the printed circuit board facing the housing to take advantage of the aforementioned recesses. Further, the invention provides an improved frame that does not require grounding and accommodates various mounting configurations of the disk drive apparatus as well as provides shock mounting capability. The present invention also provides an ambient filter assembly that inhibits the penetration of water vapor from the ambient atmosphere into the interior of the housing. Also provided is a desiccant that is housed in the lid of the housing. The large surface area of the desiccant realized by placing it in the lid of the housing results in improved rate of adsorption of water vapor present in the housing. Moreover, the present invention provides an improved flex circuit geometry that results in the flex circuit applying substantially zero torque to the actuator and, hence, eliminating the need for the componentry and the space required thereby to compensate for such a torque. These and other advantages of the disk drive apparatus will be discussed hereinafter.
- With reference to Figs. 1-4, the preferred embodiment of the
disk drive apparatus 20, hereinafter referred to asdisk drive 20, is illustrated. Thedisk drive 20 includes ahousing 22 for containing 63.5mm a 63.5mm (2.5")hard disk 24, aspin motor 26 for rotating thehard disk 24, a pair oftransducers hard disk 24, and arotary actuator assembly 30 for moving the transducers relative to the hard disk. Aramp structure 31 for unloading and storing thetransducers housing 22. Preferably, thehard disk 24 is a magnetic disk capable of storing 20-40 MBytes, or even more, of information. - The housing includes a
lid 32 having a firstexterior surface 34 and a firstinterior surface 36 located substantially parallel to the firstexterior surface 34. The housing also includes abase plate 38 that, among other things, provides a mounting surface for several of the aforementioned components. Thebase plate 38 includes a secondexterior surface 40 and a secondinterior surface 42 located substantially parallel to the secondexterior surface 40. Thebase plate 38 is made of a magnetically conductive material, such as steel, to provide a magnetic flux return path for use in the voice coil assembly of therotary actuator 30. When assembled, thelid 32 is attached to thebase plate 38 to form aninterior space 44 that contains the aforementioned components of thedisk drive apparatus 20. Preferably, a T-shaped gasket or L-shaped gasket (not shown) is employed intermediate thelid 32 and thebase plate 38 to prevent contaminants from the ambient atmosphere from entering into theinterior space 44 of thehousing 22 and affecting the operation of thedisk drive apparatus 20. - The
lid 32 includes anambient filter assembly 46 that inhibits contaminants, such as dust and dirt and other particulates, from entering theinterior space 44 of thehousing 22. Theambient filter assembly 46 includes a helically-shapedhole 48 that extends from the firstexterior surface 34 to the firstinterior surface 36 and inhibits the entry of water vapor into theinterior space 44 of thehousing 22. Holes having other shapes that result in a hole having a length greater than the shortest distance between the firstexterior surface 34 and the firstinterior surface 36 of thelid 32 are also possible. For instance, a hole that is slanted or curved relative to the firstexterior surface 34 and/or firstinterior surface 36 would lengthen the path that any water vapor would have to travel to enter theinterior space 44 of thehousing 22 and, hence, inhibit the entry of the water vapor. One such alternative to the helically-shapedhole 48 is a serpentine-shaped hole. Theambient filter assembly 46 also includes afirst filter 50 for inhibiting the entry of contaminants from the ambient atmosphere, such as dust and dirt and other particulates, into theinterior space 44. Thefirst filter 48 is located on the firstinterior surface 36 of thelid 32 adjacent to the helically-shapedhole 48. - The
lid 32 also includes a mountingsurface 52 for an L-shapedrecirculating filter 54 that utilizes the flow of air produced by the rotation of thehard disk 24 to trap contaminants, such as dust and dirt, that are within thehousing 22. - The
lid 32 also includes acompartment 56 that communicates with theinterior space 44 byholes 58 and houses aplanar desiccant 60 that adsorbs, until it reaches an equilibrium point with the atmosphere in theinterior space 44 of thehousing 22, any water vapor that has entered into theinterior space 44.First ribs 62 are also included within thecompartment 56 to elevate theplanar desiccant 60 from the bottom surface of the compartment and, hence, expose the entire bottom surface area of theplanar desiccant 60. Thefirst ribs 62 also serve to contain asecond filter 64 that is located intermediate thedesiccant 60 and the firstinterior surface 36 of thelid 32. Thesecond filter 64 prevents any of theplanar desiccant 60 from entering theinterior space 44 and possibly affecting the operation of thedisk drive 20. Anexterior hatch 66 allows access to thecompartment 56 during manufacturing, but is thereafter sealed. The large surface area of theplanar desiccant 60 made possible by its location in thelid 32 improves the ability of theplanar desiccant 60 to adsorb water vapor. The reduction in water vapor penetration of thehousing 22 achieved by the helically-shapedhole 48 also reduces the amount of water vapor that theplanar desiccant 60 must adsorb. - With reference to Fig. I₃, an alternative embodiment of the
ambient filter assembly 46 is illustrated. The alternative embodiment of theambient filter assembly 46 is implemented by modifyingcompartment 56 used to house theplanar desiccant 60 to include aledge 220 having a slot 222 with afirst end 224 and asecond end 226. Thelid 32 is also modified to includeholes 228 that communicate with thefirst end 224 of the slot 222. Thesecond end 226 of the slot 222 terminates adjacent to the top side of theplanar desiccant 60. Thelid 32, when in place, cooperates with the slot 222 to form a relatively long serpentine path for ambient air to enter theinterior space 44 of thehousing 22. Preferably, the serpentine path also has a relatively small diameter. The length of the serpentine path together with its relatively small diameter inhibits the passage of water vapor from the ambient atmosphere into theinterior space 44 of thehousing 22. Furthermore, by locating the serpentine path in series with theplanar desiccant 60, any water vapor or condensed moisture from the ambient atmosphere that has migrated from thefirst end 224 to thesecond end 226 of the slot 222 can be adsorbed by theplanar desiccant 60 and thereby prevented from reaching theinterior space 44 of thehousing 22. - Characteristic of the
base plate 38 is its threelevel shape where each level is determined by one or more of the components contained within thehousing 22. For purposes of this description, the first level will be considered the one farthest from thelid 32, the third level will be the one closest to thelid 32, and the second level will be at a point intermediate the first and third levels. The first level is determined by the heights ofspin motor 26 and therotary actuator 30. The first level is defined, at least in part, by a a bottom surface of thespin motor 26. Thespin motor 26 is mounted to thebase plate 38 such that thebottom surface 67 extends through a spinmotor mounting hole 68 in thebase plate 38. The first level is also defined by afirst well 70 for receiving a pivot capstan of therotary actuator 30, and first and second reinforcingribs motor mounting hole 68 and thefirst well 70. The first and second reinforcingribs motor mounting hole 68 and thefirst well 70 that reduces distortion of thebase plate 38 due to the operation of thespin motor 26 or therotary actuator 30. By reducing distortion, the first and second reinforcingribs rotary actuator 30 to position thetransducers hard disk 24. The second level is recessed from the first level by an amount determined by the height of a voice coil assembly portion of therotary actuator 30. The second level is defined, at least in part, by asecond well 74 and athird well 76. Thethird well 76 is located in the area bounded by the spinmotor mounting hole 68, thefirst well 70, and the first and second reinforcingribs hard disk 24. The third level is defined, at least in part, by anarea 78. When thehousing 22 is assembled, it is approximately 101.6mm (4") in length and 69.9mm (2.75") in width. The height of the housing, due to the aforementioned three-level characteristic varies between 9.7mm (0.38"), 8.6mm (0.34") and 6.9mm (0.27"). Thedisk drive apparatus 20 also includes a printedcircuit board 82 having anupper side 84 and alower side 86. Ihe printed circuit board is approximately 101.6mm (4") in length and approximately 69.9mm (2.75") in width.Electronic circuitry 88 for controlling thespin motor 26, thetransducers rotary actuator 30 are located on the upper andlower sides circuit board 82. Attached to one edge of the printedcircuit board 82 is aconnector 90 that interfaces theelectronics 88 with a firstflexible circuit 92 that provides a communication path between theelectronics 88 and the,transducers rotary actuator 30. Theconnector 90 also provides an interface between theelectronics 88 and a secondflexible circuit 94 that allows theelectronics 88 to communicate with thespin motor 26. The first and secondflexible circuits connector 90 through gaps (not shown) between thelid 32 and thebase plate 38 of thehousing 22 to, respectively, therotary actuator 30 and thespin motor 26. - The
disk drive apparatus 20 also includes a distributedframe system 98 for attaching thehousing 22 to the printedcircuit board 82 in a stacked or piggyback relationship where theupper side 84 of the printedcircuit board 82 faces thebase plate 38 of thehousing 22. With both thehousing 22 and the printedcircuit board 82 having footprints approximately 101.6mm (4.00") by approximately 69.9mm (2.75"), the piggyback relationship established by the distributedframe system 98 results in an overall footprint, including the distributedframe system 98, for thedisk drive 20 of approximately 101.6mm (4.00") by approximately 71.1mm (2.8"). With reference to Fig. 5, a cross-sectional view of a portion of the distributedframe system 98 that is used to connect a corner of thehousing 22 to a corner of the printedcircuit board 82 is illustrated. The illustrated portion of the distributedframe system 98 includes avibration isolator 100 which is made of a shock-absorbing material and located in a hole in thebase plate 38 of thehousing 22. In contact with the lower surface of thevibration isolator 100 is an L-shapedmounting bracket 102 for use in attaching thedisk drive apparatus 20 to the user's computer system. The L-shapedmounting bracket 102 includes a mountinghole 104 that allows thedisk drive apparatus 20 to be side-mounted in the user's computer system. Aspacer 106 is located intermediate the L-shapedmounting bracket 102 and the printedcircuit board 82 to establish the desired clearance between thehousing 22 and the printedcircuit board 82. - A
ferrule 108 is in contact with the upper and interior surfaces of thevibration isolator 100. Ascrew 110, that extends through a hole defined by theferrule 108, and corresponding holes in the L-shapedmounting bracket 102,spacer 106, and printedcircuit board 82 mates with a shoulderednut 1!2 to connect thehousing 22 to the printedcircuit board 82. The four corners of thebase plate 38 are attached to the corresponding four corners of the printedcircuit board 82 in the manner illustrated in Fig. 5. One advantage of the distributedframe system 98 is that, due to its relatively low surface area relative to thehousing 22, it does not require any grounding. Preferably, the surface area of the distributedframe system 98 does not exceed 5% of the surface area of thehousing 22. The distributedframe system 98 also possesses extremely low mass. Another advantage of the structure of the distributedframe system 98 is that it provides side mounting capability as well as top and bottom mounting capability. Side mounting capability is provided by the L-shapedmounting bracket 102 which includes theside mounting hole 104. Bottom and top mounting capability can be achieved by appropriate use of thescrew 110 and the shouldered nut 112. - With reference to Figs. 12A through 12D, an alternative embodiment of the distributed
frame system 98 is illustrated. The alternative embodiment of the distributedframe system 98 includes afirst member 196a for connecting two corners of thehousing 22 to the printedcircuit board 82 and an identical second member !96b for connecting the other two corners of thehousing 22 to the printedcircuit board 82. Each of the first andsecond members portion 198a and a substantially identical second connectingportion 198b that are integrally connected by arail 200. The first and second connectingportion housing 22 to the printedcircuit board 82. With reference to Fig. 12C, the connectingportions 198a is described in greater detail. The connectingportion 198a includes anupper section 202 that is separated from alower section 204 by aslot 206 that receives an edge of the printedcircuit board 82. Anintermediate section 208 integrally connects the upper andlower sections horizontal hole 210 in thelower section 204 provides side mounting capability. With reference to Fig. 12D, the alternative embodiment of the distributedframe 98 further includes ashock absorbing element 212 located in a hole in the corner of thehousing 22. Theshock absorbing element 212 operatively contacts theupper section 202 of the connectingportion 198a. The alternative embodiment of the distributedframe system 98 further includes a snap-inconnector 214 that extends through a hole defined by theshock absorbing element 212, a corresponding hole in the connectingportion 198a and a hole through the printedcircuit board 82. The snap-inconnector 214 includesclips 216 that allow it to be inserted through the aforementioned holes. However, once the clips are past the printedcircuit board 82 they catch against thelower side 86 of the printedcircuit board 82 to establish the connection between thehousing 22 and the printedcircuit board 82. The snap-inconnector 214 also includes aflange portion 216 that contacts the upper surface of theshock absorbing element 212 once theclips 216 catch against the lower side of the printed circuit board. - With reference to Figs. 4A-4B, the three level base plate of the
housing 22, together with the stacked relationship established by the distributedframe assembly 98 between thehousing 22 and the printedcircuit board 82 produces volumes between thebase plate 38 and theupper side 84 of the printed circuit board that are advantageously used to achieve an overall height dimension of approximately 15.2mm (0.6") for thedisk drive 20. Specifically, the components comprising theelectronics 88 are laid out on the printedcircuit board 82 such that the components having heights less than or equal to a specified value are located on thelower side 86 of the printedcircuit board 82. Components of greater height, which if located on thelower side 86 of the printedcircuit board 82 would add to the overall height dimension of thedisk drive apparatus 20, are located on theupper side 84 of the printedcircuit board 82 so as to occupy the volumes between theupper side 84 of the printedcircuit board 82 and the third level of thebase plate 38. While components having heights less than the specified value can be located on thelower side 86 of the printedcircuit board 82, several of these components are located on theupper side 84 of the printedcircuit board 82 so as to occupy the volumes between theupper side 84 of the printedcircuit board 82 and the second level of thebase plate 88. This allows the electronics circuitry for controlling thedisk drive 20 to be realized within the 101.6mm (4.00") by 69.9mm (2.75") footprint of the printedcircuit board 82. In the preferred embodiment of thedisk drive apparatus 20, the volume extending between theupper side 84 of the printedcircuit board 82 and the second level of thebase plate 38 accommodates components located on theupper side 84 of the printedcircuit board 82 having a nominal height of 1.27mm (0.050 inch). Components having a nominal height of 3.23mm (0.l27inch) are located on theupper side 84 of the printedcircuit board 82 to take advantage of the volume extending between theupper side 84 of the printedcircuit board 82 and the third level of thebase plate 38. The area between theupper side 84 of the printedcircuit board 82 and the first level of thebase plate 38 does not contain any electronic components, since to do so would increase the overall height of thedisk drive apparatus 20. Located on thelower side 86 of the printedcircuit board 82 are components that have a nominal height of 3.05mm (0.120"). Fig. 6 is a map of theupper side 84 of the printedcircuit board 82 that indicates the areas where no components can be located, the areas where components having a height of 1.27mm (0.050 inch) can be located, and the areas where components having a height of 3.23mm (0.127 inch) can be located. - With reference to Figs. 7 and 8, the
spin motor 26, preferably a brushless DC motor, used in thedisk drive apparatus 20 is illustrated. As previously indicated thespin motor 26 determines the maximum height dimension of thehousing 22. The maximum height dimension of thehousing 22, in turn, determines the overall height dimension of thedisk drive apparatus 20. Thespin motor 26 realizes a reduced height dimension, relative to known spin motors, that is used to realize an overall height dimension for thedisk drive 20 of approximately 15.2mm (0.6 inch) and is described hereinafter. Thespin motor 26 includes abase member 116 that forms the bottom of thespin motor 26 and provides aflanged portion 118 for mounting thespin motor 26 in the spinmotor mounting hole 68 of thebase plate 38. Thespin motor 26 further includes astator 120 for producing, under the control of theelectronics circuitry 88, a rotating magnetic fields Thestator 120 includesstator laminations 122 andstator windings 124, as is well known in the art, for use in producing the aforementioned rotating magnetic field. The stator laminations 122 andstator windings 124 are operatively connected to thebase member 116. Thespin motor 26 further includes arotor assembly 126 that, in response to the rotating magnetic field produced by thestator 120, rotates about an axis ofrotation 128. Therotor assembly 126 includes anouter shell 130 that has ashoulder 132 for supporting thehard disk 124. Aclamp ring 134 is used to hold thehard disk 124 in place against theshoulder 132 of theouter shell 130. Preferably, theclamp ring 134 is threaded to operatively engage a threaded surface on the upper, circumferential edge of theouter shell 130. Therotor assembly 126 also includes arotor shaft 136 that is integral with theouter shell 130 and fits within acentral opening 138 defined by thebase member 116. First and second bearing/race assemblies 140a, 140b, are located intermediate therotor shaft 136 and the portion of thebase member 116 defining thecentral opening 138 to allow therotor assembly 126 to rotate relative to thebase member 116 as well as provide support. Therotor assembly 126 further includes twelve magnets 142a-1, each of which has a north pole face and a south pole face, that are attached to the interior surface of theouter shell 130 such that adjacent magnets have opposite poles facing thestator 120. Interaction of the magnetic fields produced by the magnets 142a-1 with the rotating magnetic field produced by thestator 120 causes the rotor assembly I₂₆ to rotate about the axis ofrotation 128. For thespin motor 126 to have a reduced height dimension relative to known spin motors, the height of the magnets 142a-1 must be reduced. Reducing the height of the magnets 142a-1, however, results in the magnets 142a-1 having an insufficient flux density when typical magnetic materials are used. Consequently, the magnets 142a-1 are made from a material including a rare earth, such as neodymium or samarium. Preferably, the magnets 142a-1 are made from a material that includes neodymium, boron and iron. The material is produced using a sintering process. The utilization of such materials to realize the magnets 142a-1 results in magnets h-aving a reduced height, an energy product in excess of 2.39 x 10⁵ Tesla-amperes per metre (30 million gauss-oersteds) and a motor constant of approximately 5.47 x 10⁵ Nm/Watt½ (0.76 in.- oz./watt½). Magnets made from this material and having such high energy products cannot be bonded with plastic or other materials to form the torous-shaped magnetic structures typically employed in spin motors. Consequently, the magnets 142a-1 are substantially planar and are attached to correspondingly planar surfaces machined on the interior of theouter shell 130. Utilization of magnets 142a-1 results in a spin mtor having a height dimension of less than 8.9mm (0.35"). - The
rotary actuator assembly 30 embodies the wellknown Whitney style technology. Therotary actuator assembly 30 includes apivot capstan 146 that establishes the axis of rotation for therotary actuator assembly 30. Thepivot capstan 146 is located in, and attached to, thebase plate 38 at thefirst well 70. Therotary actuator assembly 30 further includes anarm assembly 148 that is operatively attached to thepivot capstan 146 and is substantially triangular in shape. Preferably, thearm assembly 148 includes first andsecond arms second transducers hard disk 24. Therotary actuator assembly 30 further includes avoice coil assembly 154 that, in response to signals from theelectronics 88, causes thearm assembly 148 to rotate about thepivot capstan 146 and thereby position thetransducers hard disk 24. Thevoice coil assembly 154 includes anelectromagnetic coil 156 that is operatively attached to thepivot capstan 146 by first andsecond legs electromagnetic coil 156 is triangularly shaped and is wound about an axis parallel to the rotational axis of thepivot capstan 146. Thevoice coil assembly 154 further includes avoice coil magnet 160 for creating a steady-state magnetic field that is used in conjunction with a magnetic field produced by theelectromagnetic coil 156 to rotate thearm assembly 148 about thepivot capstan 146. Thevoice coil magnet 160 is attached to thebase plate 38 at a point below theelectromagnetic coil 156. Apost 162 limits the extent to which thearm assembly 148 can rotate in a counterclockwise position about thepivot capstan 146. Thepost 162 includes a first orinner crash stop 164 that interacts with thefirst leg 158a to prevent further counterclockwise rotation of thearm assembly 148 as well as prevent damage to therotary actuator assembly 30 by absorbing some of the rotational energy of thearm assembly 148. Thefirst crash stop 164 preferably includes a leaf spring that is cantilevered or simply supported. Also included in thevoice coil assembly 154 is aflux return plate 166 for providing a portion of a magnetic circuit that constrains the magnetic flux produced by theelectromagnetic coil 156 and thevoice coil magnet 160 to the area between theflux return plate 166 and thehousing 22. The flux return plate extends from the top of thepost 162 across theelectromagnetic coil 156 and down to thebase plate 38. The magneticflux return plate 166 is positioned by first andsecond pins voice coil magnet 160. Attached to the magneticflux return plate 166 is a second orouter crash stop 170 that limits the rotation of theelectromagnetic coil 156 and, hence, thearm assembly 148 in the clockwise direction. Thesecond crash stop 170 is made from a shock absorbing elastomeric material. Thesecond crash stop 170 includes a first frusto-conical portion 172 that is inserted through a hole in the magneticflux return plate 166 and serves to hold thesecond crash stop 170 in place. Thesecond crash stop 170 also includes a second frusto-conical portion 174 for absorbing the rotational energy of therotary actuator assembly 130 when it has rotated too far in the clockwise direction. - The height of the
voice coil assembly 154 determines where the second level of thebaseplate 38 is located relative to the first level. Consequently, the height of thevoice coil assembly 154 also determines the height of the volumes between theupper side 84 of the printedcircuit board 82 and the second level of thebase plate 38 and, hence, the height of the electronic components that can be located on theupper side 84 of the printedcircuit board 82. In the preferred embodiment of thedisk drive 20, components having a height of 1.27mm (0.050") can be located in these volumes. This, in turn, allows an overall footprint of approximately 101.6mm (4.0") x 71.7MM (2.8") to be attained for thedisk drive 20. ' With reference to Fig. 9, the low profile features of thevoice assembly 154 are illustrated. Thebase plate 38, thepost 162, and the magneticflux return plate 166 are all made of magnetically conductive materials, such as steel, and define a magnetic circuit that constrains the magnetic fields produced by thevoice coil magnet 160 to the gap between thevoice coil magnet 160 and the magneticflux return plate 166. By so constraining the magnetic field produced by the voice coil magnet 160 a high torque constant for therotary actuator 30 is realized. In addition, the magnetic fields are prevented from affecting information established on thehard disk 24. The reduced height of thevoice coil assembly 154 is attained by using thebase plate 38 as flux return path, as a mounting surface for therotary actuator assembly 30 and thehard disk 24, and as a portion of thehousing 22 that prevents contaminants from affecting the operation of thedisk drive apparatus 20. Consequently, thebase plate 38 serves three purposes and allows a voice coil assembly of reduced height to be realized. - Fig. 10 is a detailed illustration of the construction of the helically-shaped
hole 48 in theambient filter assembly 46. The helically-shapedhole 46 is produced by establishing a threadedhole 178 extending from the firstexterior surface 34 to the firstinterior surface 36 of thelid 32 using an oversized tap drill. The threaded hole 176 is then tapped with a regular or standard size tap drill to shear off the top portions of the threads in the threaded hole 176. A threadedset screw 180 is then screwed into the threaded hole 176 to establish the helically-shapedhole 46 between the bottom portions of threads in the threadedhole 178 and the top portions of the threads of theset screw 178. - With reference to Fig. 11, the torque reducing geometry of the first
flexible circuit 92 is illustrated for two positions of therotary actuator 30. Theflexible circuit 92 includes afirst portion 184 that extends from theconnector 90 on the printedcircuit board 82 through a gap (not shown) between thelid 32 and thebase plate 38 to the secondinterior surface 42 of thebase plate 38 where it is attached. The firstflexible circuit 92 includes asecond portion 186 having afirst end 188 attached to anexterior surface 190 of therotary actuator 30 and asecond end 192 attached to the secondinterior surface 42 of thebase plate 38. The firstflexible circuit 92 is preferably comprised of three layers of flexible material. The two outer-most layers each have a thickness of approximately 2.54 x 10⁻²mm (0.001 inch) and are made of a flexible, insulating material, such as KAPTON. The third layer is located intermediate the two outermost layers, is also approximately 3.56 x 10⁻²mm (0.0014 inch) thick and is made of a 28.35g (one-ounce) conductive material, such as copper, with individual circuits etched in the conductive material. Located intermediate to each of the outermost layers and the intermediate conductive layer is an adhesive layer having a thickness of approximately 1.52 x 10⁻²mm (0.0006 inch). The overall thickness of theflexible circuit 92 is approximately 12.7 x 10⁻²mm (0.005 inch). The thickness of theflexible circuit 92 results in a relatively low flexular modulus that, in turn, reduces the ability of thesecond portion 186 of the firstflexible circuit 92 to apply a torque to therotary actuator 30 that would affect the position of the first andsecond transducers hard disk 24. The ability of thesecond portion 186 of thefirst flex circuit 92 to apply a torque to therotary actuator 30 is further reduced by establishing a geometry for thesecond portion 186 of the firstflexible circuit 92 that results in a substantially radial force being applied to therotary actuator 30. The radial force, in contrast to a tangential or torque producing force, does not substantially affect the position of thetransducers hard disk 24. The geometry of thesecond portion 186 of the firstflexible circuit 92 is best described by analyzing the problem in terms of given parameters and the boundary conditions of thefirst end 186 and thesecond end 192 of thesecond portion 186 of the firstflexible circuit 92. The given parameters of the problem are the flexure modulus and the length of thesecond portion 186 of theflexible circuit 92. Relative to thefirst end 188 of thesecond portion 186 of the firstflexible circuit 92, the relevant boundary conditions are the angle through which therotatry actuator 30 turns and the distance from the axis of rotation to theexterior surface 190 of therotary actuator 30 where thefirst end 188 is attached. The boundary condition relating to thesecond end 192 of thesecond portion 186 of the firstflexible circuit 92 is that it must be fixed relative to the axis of rotation of theactuator 30. Given these boundary conditions, a double or S-shaped curve can be imposed upon thesecond portion 186 of theflexible circuit 92 that results in a substantially radial force, as determined by a free body analysis at the point of inflection between the two curves, being applied to therotary actuator 30 through the angle in which it rotates. The S-shaped curve of thesecond portion 186 that provides substantially only a radial force on therotary actuator 30 is determined by the position of thesecond end 192 of theflexible circuit 92 relative to the axis of rotation of therotary actuator 30 for the aforementioned given parameters and boundary conditions of thefirst end 188 of thesecond portion 186 of the firstflexible circuit 92. Once this point is established, thefirst end 188 and thesecond end 192 are fixed at angles that are tangential to the two curves established in thesecond portion 186 of theflexible circuit 92. - The foregoing description of the invention has been presented for purposes of illustration and description. Further, the description is not intended to limit the invention to the form disclosed therein. Consequently, variations and modifications commensurate with the above teachings, and the skill or knowledge in the relevant art are within the scope of the present invention. The preferred embodiment described hereinabove is further intended to explain the best mode known of practicing the invention and to enable others skilled in the art to utilize the invention in various embodiments and with the various modifications required by their particular applications or uses of the invention.
Claims (41)
a spin motor (26) for rotating said hard disk (24);
a transducer (28) for communicating with said hard disk (24);
a rotary actuator (30) for moving said transducer (28) relative to said disk (24), said rotary actuator (30) including a pivot capstan (146) and a voice coil assembly (154);
a housing (22) for containing said hard disk (24), said spin motor (26), said transducer (28) and said rotary actuator (30) in an interior thereof, said housing (22) having an exterior surface, an interior surface, a first top side and a first bottom side;
a printed circuit-board (82) having a second top side (84) and a second bottom side (86);
electronic means (88) for controlling at least one of the following: said spin motor (26), said transducer (28) and said rotary actuator (30), said electronic means (88) including a first component of a first height and a second component of a second height greater than said first height, said first and second components located on said first side of said printed circuit board (82); and
frame means (98) for connecting said housing (22) to said printed circuit board (82) in a stacked relationship where said first bottom side of said housing (22) faces said second top side (84) of said printed circuit board (82);
wherein a first cross-section of said disk drive apparatus (20) includes said first top side of said housing (22), one of the following: said spin motor (26) and said pivot capstan (146), and said printed circuit board (82), wherein said frist cross-section is no greater than approximately 16.0mm (0.630 inch) in height;
wherein a second cross-section of said disk drive apparatus (20} includes said first top side of said housing (22), said voice coil assembly (154), said first bottom side of said housing, said first component and said printed circuit board (82), wherein said second cross-section is no greater than approximately 16.0mm (0.630 inch) in height;
wherein a third cross-section of said disk drive apparatus (20) includes said first top side of said housing (22), said hard disk (24), said first bottom side of said housing (22), said second component and said printed circuit board (82), wherein said third cross-section is no greater than approximately 16.0mm (0.630 inch) in height.
said hard disk (24) has a diameter no greater than approximately 63.5mm (2.5 inches).
said disk drive apparatus (20) has a footprint of approximately 71.1mm (2.8 inches) by approximately 101.6mm (4.0 inches).
said electronic means (88) includes a third component having a third height located on said second bottom side of said printed circuit board (82), wherein said height of said disk drive apparatus (20) from said first top side of said housing (22) to said third component is no greater than approximately 16.0mm (0.630 inch).
said spin motor (26) includes a magnet made of a material including a rare earth.
said spin motor (26) includes a magnet (142) having an energy product in excess of 2.39 x 10⁵ Teslaamperes per metre (30 million gauss-oersteds).
said spin motor (26) has a height dimension no greater than approximately 15.2mm (0.6 inch).
one of the following: said first top side and said first bottom side of said housing (22) provides a portion of a magnetic flux return path for said voice coil assembly (154).
said voice coil assembly (154) including a magnet (160) and a voice coil (156) in a stacked relationship having a height dimension of less than approximately 8.9mm (0.35 inch).
a hard disk having a diameter less than or substantially equal to 63.5mm (2.5 inches);
a spin motor for rotating said hard disk, said spin motor including a magnet made of a material including a rare earth and having an energy product in excess of 2.39 x 10⁵ Tesla-amperes per metre (30 million gauss-oersteds), said spin motor having a height dimension of less than approximately 10.2mm (0.4 inch);
a transducer for communicating with said hard disk;
a rotary actuator for moving said transducer relative to said hard disk, said rotary actuator including a pivot capstan, a voice coil and a magnet in a stacked relationship having a height dimension of less than 8.9mm (0.35 inch);
a housing for containing said hard disk, said spin motor, said transducer and said rotary actuator in an interior thereof, said housing having an exterior surface, an interior surface, a hole extending from said exterior surface to said interior surface, a first top side and a first bottom side, wherein said hole is helically-shaped;
a desiccant in communication with said interior and located intermediate said interior surface and said exterior surface of said housing;
a printed circuit board having a second top side and a second bottom side;
electronic means for controlling said spin motor, said transducer and said rotary actuator, said electronic means includes a first component of a first height, a second component of a second height greater than said first height, and a third component having a third height, said first and second components located on said second top side of said printed circuit board and said third component located on said second bottom side of said printed circuit board; and
frame means for connecting said housing to said printed circuit board in a stacked relationship where said first bottom side of said housing faces said second top side of said printed circuit board, wherein said frame provides side, bottom and top mounting capability and wherein said disk drive apparatus has a foot print of approximately 71.1mm (2.8 inches) by approximately 101.6mm (4.0 inches) and a height dimension of approximately 16.0mm (0.630 inch) or less;
wherein a first cross-section of said disk drive apparatus includes only said first top side of said housing, one of the following: said spin motor and said pivot capstan, and said printed circuit board, where said first cross-section is less than or equal to 16.0mm (0.630 inch) in height;
wherein a second cross-section of said disk drive apparatus includes said first top side of said housing, said voice coil assembly, said first bottom side of said housing, said first component, said printed circuit board and said second component, wherein said second cross-section is less than or equal to 16.0mm (0.630 inch) in height;
wherein a third cross-section of said disk drive apparatus includes said first top side of said housing, said hard disk, said first bottom side of said housing, said second component, said printed circuit and said third component, wherein said third cross-section is less than or equal to 16.0mm (0.630 inch) in height.
a record carrier (24);
first means (26) for moving said record carrier (24);
a transducer (28) for communicating with said record carrier (24);
second means (30) for moving said transducer relative to said record carrier (24); and
a housing (22) for containing said record carrier (24), said first means (26), said transducer (28) and said second means (30) in an interior thereof and protecting said record carrier (24) from an ambient atmosphere, said housing (22) having a hole (48) extending between an interior surface and an exterior surface of the housing (22);
which hole is of a length greater than the shortest distance between said interior surface and said exterior surface to reduce penetration of moisture from said ambient atmosphere to said interior.
said interior surface is parallel to said exterior surface.
said hole (48) is slanted relative to said exterior eurface or said interior surface.
said hole (48) is helically-shaped serpentineshaped or curved.
first means (26) for moving said record carrier (24);
a transducer (28) for communicating with said record carrier (24);
second means (30) for moving said transducer relative to said record carrier (24); and
a housing (22) for containing said record carrier (24), said first means (26), said transducer (28) and said second means (30) in an interior thereof, said housing (22) having an interior surface and an exterior surface; and
a desiccant (60) in communication with said interior;
wherein at least a portion of said desiccant (60) is located between said interior surface and said exterior surface.
said desiccant (60) is located in a plane substantially parallel to said record carrier (20).
said desiccant (60) is substantially planar.
a filter (64) located between said desiccant (60) and said interior to prevent said desiccant (60) from entering into said interior.
a record carrier (20);
a transducer (28) for communicating with said record carrier (24);
means (30) for moving said transducer relative to said record carrier (24); and
a motor (26) for moving said record carrier, said motor including a magnet (142), wherein said motor (26) has a height dimension of less than approximately 15.2mm (0.0 inch).
said magnet (142) is made from a material which includes a rare earth.
said magnet (142) is made from a material including at least one of the following: neodymium and samarium.
said magnet (142) is made from a material including neodymium, boron and iron.
said motor has a motor constant of at least approximately 5.47 x 10⁻⁵ Nm/watt½ (0.76 in.- oz/watt½).
said magnet (142) has an energy product in excess of approximately 2.39 x 10⁵ Tesla-amperes per metre (30 million gauss-oersteds).
said motor (26) is a brushless DC motor and is about 8.9mm (0.35 inch) in height.
said magnet (142) is substantially planar in shape.
a transducer (28) for communicating with said record carrier (24);
a rotary actuator (30) for moving said transducer (28) relative to said record carrier (24), said rotary actuator (30) rotating about an axis through a defined angle and having a surface disposed non adjacently said axis;
electronic means (88) for providing information to position said transducer (28) relative to said record carrier (20); and
a flexible circuit (92) connecting said electronic means (88) to said rotary actuator (30), said flexible circuit (92) including a first end attached to said surface and a second end attached to a point separated from said rotary actuator (30);
wherein said first and said second ends impose on said flexible circuit (92) located therebetween a first curve, a point of inflection and a second curve;
wherein said first and second ends are fixed at angles tangent to said first and second curves; and
wherein the resultant force on said rotary actuator (30) as determined at said point of inflection produces a substantially zero torque on said rotary actuator (30).
said flexible circuit (92) includes a first layer of flexible material. having a thickness of substantially 2.54 x 10⁻²mm (0.001 inch), a second layer of flexible material having a thickness of substantially 2.54 x 10⁻²mm (0.001 inch) and a third layer of flexible material located intermediate said first and second layers having a thickness of substantially 3.56 x 10⁻²mm (0.0014 inch), said third layer of flexible material including a 28.35g (one ounce) conductive material.
first means (26) for moving said record carrier (24);
a transducer (28) for communicating with said record carrier (24);
second means (30) for moving said transducer (28) relative to said record carrier (24), said second means (30) for moving including a motor (26) having a voice coil (156) and a magnet (160);
a housing (22) for containing said record carrier (24), said first means (26), said transducer (28) and said second means (30);
wherein said housing (22) provides a portion of a magnetic flux return path for said magnet (160).
at least one of said first (26) and second means (30) for moving is mounted to said housing (22).
said motor (20) is a rotary motor.
said motor (26) includes a magnetic flux return plate (166) held in place by said magnet (160).
said magnet (160) and voice coil (156) are in a stacked relationship having a height dimension of less than approximately 8.9mm (0.35 inch).
first means (26) for moving said record carrier (24);
a transducer (28) for communicating with said record carrier (24);
second means (30) for moving said transducer (28) relative to said record carrier (24);
a housing (22) for containing said record carrier (24), said first means (26), said transducer (28) and said second means (30), said housing (22) having a first surface area;
a printed circuit board (82);
electronic means (88) located on said printed circuit board (82) for use in controlling at least one of the following: said first means (26), said transducer (28) and said second means (30); and
means for connecting said housing (22) to said printed circuit board (82), said means for connecting (98) including at least two separate members.
said means for connecting (98) has a surface area that is less than about five percent of the surface of said housing (22).
a record carrier (24) for storing information; first means (26) for moving said record carrier (24);
a transducer (28) for communicating with said record carriers (24);
second means (30) for moving said transducer (28) relative to said record carrier (24);
a housing (22) for containing said record carrier (24), said first means (26), said transducer (28) and said second means (30);
a printed circuit board (82);
an electronic means (88) located on said printed circuit board for use in controlling at least one of the following: said first means (26), said transducer (28) and said second means (30); and frame means (98) for connecting said housing (22) to said printed circuit board (88), wherein said frame means (98) provides side, bottom and top mounting capability.
said frame means (98) includes L-shaped means (102) for use in providing said side mounting capability.
said frame means (98) includes shock absorbing means (100).
a spin motor (26) for rotating said hard disk (24);
a transducer (28) for communicating information with said hard disk (24);
a rotary actuator (30) including arm means (148) and motor means (154);
circuit means (92) connected to said rotary actuator (30) communicating with said transducer means (28);
housing means (22) for housing said hard disk (24), said spin motor means (26), said transducer (28) and said rotary actuator (30);
a printed circuit board (82);
electronic means (88) located on said circuit board (82) for controlling at least one of the following: said spin motor (26), said transducer (28) and said rotary actuator (30);
means (98) for connecting said housing to said printed circuit board (82) in a stacked relationship wherein said information storage apparatus has a height no greater than approximately 16.0mm (0.630 inch).
said housing (22), said printed circuit board (82) and said means for connecting (98) have a foot print of approximately 101.6mm (4.0 inches) by approximately 71.1mm (2.8 inches).
said hard disk (24) has a diameter no greater than approximately 63.5mm (2.5 inches).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US432664 | 1989-11-06 | ||
US07/432,664 US5025336A (en) | 1989-11-06 | 1989-11-06 | Disk drive apparatus |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0427490A2 true EP0427490A2 (en) | 1991-05-15 |
EP0427490A3 EP0427490A3 (en) | 1992-07-08 |
EP0427490B1 EP0427490B1 (en) | 1997-03-26 |
Family
ID=23717099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90312087A Expired - Lifetime EP0427490B1 (en) | 1989-11-06 | 1990-11-05 | Disk drive apparatus |
Country Status (7)
Country | Link |
---|---|
US (3) | US5025336A (en) |
EP (1) | EP0427490B1 (en) |
JP (1) | JPH03207076A (en) |
KR (1) | KR100235264B1 (en) |
AT (1) | ATE150894T1 (en) |
DE (1) | DE69030297T2 (en) |
TW (1) | TW218047B (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2252660A (en) * | 1990-11-29 | 1992-08-12 | Mitsubishi Electric Corp | Electronic parts and connector mounting structure of disk unit |
EP0526703A2 (en) * | 1991-07-29 | 1993-02-10 | Areal Technology, Inc. | Compact disk drive useful for laptop computer |
EP0534745A2 (en) * | 1991-09-24 | 1993-03-31 | Kalok Corporation | High capacity, low profile disk drive system |
EP0537707A2 (en) * | 1991-10-15 | 1993-04-21 | Areal Technology, Inc. | Assembly of compact disk drive |
EP0542183A2 (en) * | 1991-11-14 | 1993-05-19 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproducing apparatus |
EP0553551A2 (en) * | 1992-01-21 | 1993-08-04 | Fujitsu Limited | Optical disk apparatus having a reduced size |
EP0556287A1 (en) * | 1990-11-09 | 1993-08-25 | Conner Peripherals, Inc. | High performance disk drive architecture |
EP0569593A1 (en) * | 1991-11-22 | 1993-11-18 | Fujitsu Limited | Disc device |
EP0597189A2 (en) * | 1992-11-13 | 1994-05-18 | Hewlett-Packard Company | Low profile rotary actuator structure for a hard disk drive |
EP0602677A2 (en) * | 1992-12-18 | 1994-06-22 | Sony Corporation | Magnet-optical disc drive device |
DE4429900A1 (en) * | 1993-08-30 | 1995-03-09 | Fujitsu Ltd | Magnetic-disk device |
EP0671044A1 (en) * | 1992-10-14 | 1995-09-13 | Maxtor Corporation | 10 millimeter form factor for a 2.5 inch disk drive |
EP0678855A1 (en) * | 1994-04-21 | 1995-10-25 | Hitachi, Ltd. | Magnetic storage apparatus |
US5469421A (en) * | 1988-09-05 | 1995-11-21 | Seiko Epson Corporation | Floppy disk drive device |
WO1996004656A1 (en) * | 1994-08-02 | 1996-02-15 | Conner Peripherals, Inc. | Disk drive including embedded voice coil magnet plates |
EP0738417A4 (en) * | 1992-11-13 | 1996-03-15 | Maxtor Corp | Air filter and circulation system for a hard disk drive |
EP0712129A1 (en) * | 1993-07-30 | 1996-05-15 | Citizen Watch Co. Ltd. | Magnetic disc device |
WO1996014637A1 (en) * | 1994-11-08 | 1996-05-17 | Conner Peripherals, Inc. | Disk drive including multi-stage environmental diffusion buffer |
EP0696030A3 (en) * | 1994-08-01 | 1996-06-26 | Hitachi Ltd | Head locating actuator and disk apparatus incorporating the same |
US5608592A (en) * | 1992-10-29 | 1997-03-04 | Fujitsu Limited | Head actuator |
EP0766233A3 (en) * | 1991-06-10 | 1998-01-07 | Fujitsu Limited | Magnetic disk drive |
WO1998041989A1 (en) * | 1997-03-17 | 1998-09-24 | Donaldson Company, Inc. | Adsorbent construction and method |
US6143058A (en) * | 1997-03-17 | 2000-11-07 | Donaldson Company, Inc. | Adsorbent construction and method |
US6146446A (en) * | 1998-10-08 | 2000-11-14 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
US6168651B1 (en) | 1998-10-08 | 2001-01-02 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
SG98402A1 (en) * | 1999-06-04 | 2003-09-19 | Sony Corp | Disc drive and optical disc drive |
Families Citing this family (127)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5956213A (en) * | 1988-01-25 | 1999-09-21 | Seagate Technology, Inc. | Latch mechanism for disk drive using magnetic field of actuator magnets |
US5235482A (en) * | 1989-11-09 | 1993-08-10 | Rodime Plc | Magnetic disk drive incorporating a mechanically damped base |
JPH0371457U (en) * | 1989-11-13 | 1991-07-19 | ||
JPH0636522Y2 (en) * | 1989-11-22 | 1994-09-21 | ティアツク株式会社 | Disk cartridge erroneous insertion prevention mechanism |
US6069766A (en) * | 1990-02-09 | 2000-05-30 | Seagate Technology, Inc. | Miniature hard disc drive having low profile actuator arm voice coil and spindle motors |
US5808838A (en) * | 1990-02-09 | 1998-09-15 | Seagate Technologies, Inc. | Miniature head disc drive system voice coil with single coil and dual stationary magnets |
US5202804A (en) * | 1990-05-18 | 1993-04-13 | Kabushiki Kaisha Toshiba | Magnetic disk drive with a magnetic head rotationally actuated |
EP0532609A4 (en) * | 1990-06-01 | 1993-09-08 | Conner Peripherals, Inc. | Two and one half inch diameter multiple disk drive |
US5255136A (en) * | 1990-08-17 | 1993-10-19 | Quantum Corporation | High capacity submicro-winchester fixed disk drive |
JP2862651B2 (en) * | 1990-08-31 | 1999-03-03 | 株式会社東芝 | Magnetic disk drive |
EP0563230B1 (en) * | 1990-12-19 | 2000-02-16 | Mobile Storage Technology Inc. | Miniature hard disk drive for portable computer |
JPH04268279A (en) * | 1991-02-22 | 1992-09-24 | Sony Corp | Hard disk device |
US5875067A (en) * | 1991-03-22 | 1999-02-23 | Seagate Technology, Inc. | Acoustic isolator for a disc drive assembly |
KR100246511B1 (en) * | 1991-09-11 | 2000-03-15 | 토마스 에프. 멀베니 | 1.8" winchester drive card |
US5483419A (en) * | 1991-09-24 | 1996-01-09 | Teac Corporation | Hot-swappable multi-cartridge docking module |
US5446609A (en) * | 1991-09-24 | 1995-08-29 | Teac Corporation | Low profile disk drive assembly |
US6310747B1 (en) | 1991-09-25 | 2001-10-30 | Mobile Storage Technology, Inc. | Method for reducing external signal interference with signals in a computer disk storage system |
US5379171A (en) * | 1991-09-25 | 1995-01-03 | Integral Peripherals | Microminiature hard disk drive |
US5270887A (en) * | 1991-12-04 | 1993-12-14 | Western Digital Corporation | Compact disk drive head disk assembly with conformable tape seal |
US5596738A (en) * | 1992-01-31 | 1997-01-21 | Teac Corporation | Peripheral device control system using changeable firmware in a single flash memory |
US5396388A (en) * | 1992-02-27 | 1995-03-07 | Censtor Corp. | Compact, high-speed, rotary actuator and transducer assembly with reduced moment of inertia and mass-balanced structural overlap with drive motor and organizing method for the same |
SG44367A1 (en) * | 1992-03-10 | 1997-12-19 | Ibm | Disk drive system |
US5243495A (en) * | 1992-03-20 | 1993-09-07 | Digital Equipment Corporation | Removable enclosure housing a rigid disk drive |
US5222897A (en) * | 1992-04-01 | 1993-06-29 | Emc Corporation | Circuit board inserter/ejector system |
JP2516162Y2 (en) * | 1992-04-02 | 1996-11-06 | ティアック株式会社 | Flexible printed circuit in disk device |
US5491607A (en) * | 1992-04-14 | 1996-02-13 | Abekas Video Systems, Inc. | Method of modifying a disk drive from serial to parallel operation |
JPH0590693U (en) * | 1992-04-27 | 1993-12-10 | 株式会社東芝 | Electromagnetic shielding structure of magnetic disk device |
US5396384A (en) * | 1992-05-12 | 1995-03-07 | Quantum Corporation | Hard disk drive architecture |
US5519270A (en) * | 1992-08-19 | 1996-05-21 | Fujitsu Limited | Spindle motor and disk drive having the same |
US5436517A (en) * | 1992-08-24 | 1995-07-25 | Nagano Nidec Corporation | Recording disk driving apparatus |
DE69329036T2 (en) * | 1992-09-23 | 2000-11-16 | Seagate Technology | SHAPE FACTOR 2.5 INCH DISK DRIVE LOW HEIGHT |
JPH06215530A (en) * | 1992-09-28 | 1994-08-05 | Fujitsu Ltd | Disk storage system |
JP3129894B2 (en) * | 1992-10-26 | 2001-01-31 | 富士通株式会社 | Disk storage system |
US5373407A (en) * | 1992-11-12 | 1994-12-13 | Mitsumi Electric Co., Ltd. | Disk drive spindle motor |
US5357386A (en) * | 1992-11-13 | 1994-10-18 | Seagate Technology, Inc. | Disc drive with head/disc assembly having sealed connectors |
WO1994011879A1 (en) * | 1992-11-13 | 1994-05-26 | Conner Peripherals, Inc. | Lubricated disk drive |
AU5871394A (en) * | 1992-12-18 | 1994-07-19 | Wayne C. Lockhart | Portable low profile information storage system |
US6002546A (en) * | 1993-02-10 | 1999-12-14 | Fujitsu Limited | Magnetic disk apparatus with visco elastic shock dampening |
US5980616A (en) * | 1993-02-16 | 1999-11-09 | Donaldson Company, Inc. | Filter media for preventing carbon migration |
WO1994022133A1 (en) * | 1993-03-17 | 1994-09-29 | Conner Peripherals, Inc. | High capacity two and one-half inch disk drive |
US5375021A (en) * | 1993-05-13 | 1994-12-20 | Maxtor Corporation | Bracket assembly which creates a pair of loops in a flexible circuit board that couples an actuator arm to the control circuits of a hard disk drive |
US5420733A (en) * | 1993-06-09 | 1995-05-30 | Maxtor Corporation | Electrical connector that is fastened to a hard disk drive housing by pins that extend from a housing and are inserted into corresponding connector apertures |
CA2164853A1 (en) * | 1993-06-11 | 1994-12-22 | Allen Cuccio | Type ii pcmcia hard disk drive card |
US5546250A (en) * | 1993-06-24 | 1996-08-13 | Maxtor Corporation | Elastomer gasket that extends around the outer edge of a hard drive |
USH1573H (en) * | 1993-07-01 | 1996-08-06 | Budde; Richard A. | Reduced mass/inertia suspension |
CA2165964C (en) * | 1993-07-08 | 2005-03-15 | Curt Bruner | System architecture for hdd |
US5414574A (en) * | 1993-07-29 | 1995-05-09 | International Business Machines Corporation | Hybrid base for ultrathin disk drives |
US5491395A (en) * | 1993-09-17 | 1996-02-13 | Maxtor Corporation | TUT servo IC architecture |
US5557486A (en) * | 1993-12-02 | 1996-09-17 | Hitachi, Ltd. | Thin external memory unit with hard disk |
US5835298A (en) * | 1996-08-16 | 1998-11-10 | Telxon Corporation | Hard drive protection system and method |
US5631094A (en) * | 1994-01-28 | 1997-05-20 | Komag, Incorporated | Magnetic alloy for improved corrosion resistance and magnetic performance |
US5389850A (en) * | 1994-02-04 | 1995-02-14 | Maxtor Corporation | Rotational shock sensor |
US5537269A (en) * | 1994-05-20 | 1996-07-16 | Dastek Corporation | Method for loading the slider of a head gimbal assembly |
US5483397A (en) * | 1994-06-28 | 1996-01-09 | Quantum Corporation | Damping configuration for improved disk drive performance |
MY113852A (en) * | 1994-09-14 | 2002-06-29 | Mitsubishi Electric Corp | Frame for flexible disk drive unit having distortion prevention hole and 2 ribs formed around motor attaching hole |
US5663603A (en) * | 1994-12-08 | 1997-09-02 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Rotary element driving device |
US6260257B1 (en) | 1994-12-19 | 2001-07-17 | Mobile Storage Technology, Inc. | Method of manufacturing an information storage disk drive with variable zone layout and track pitch parameter considerations |
US5596458A (en) | 1994-12-19 | 1997-01-21 | Integral Peripherals, Inc. | Variable zone layout for information storage disk drive |
US5606474A (en) * | 1995-01-17 | 1997-02-25 | Latsu, Inc. | High density disk drive with accelerated disk access |
US5585679A (en) * | 1995-05-25 | 1996-12-17 | Iomega Corporation | One-piece magnet return path assembly for a disk drive actuator |
JPH0982079A (en) * | 1995-07-10 | 1997-03-28 | Fujitsu Ltd | Optical memory |
JP3414560B2 (en) * | 1995-10-30 | 2003-06-09 | 富士通株式会社 | Disk unit cover structure |
WO1997020310A1 (en) * | 1995-11-28 | 1997-06-05 | Micropolis Corporation | Twin coil positioning device for use in a family of hard disk drives having interchangeable magnet components |
JP3364562B2 (en) * | 1995-12-01 | 2003-01-08 | ミネベア株式会社 | Motor structure |
JP2000503793A (en) * | 1996-01-19 | 2000-03-28 | クウォンタム・コーポレイション | Low profile disk drive architecture with in-line circuit board and flex circuit pressure pin connector |
US5764437A (en) * | 1996-01-22 | 1998-06-09 | Seagate Technology, Inc. | Pivoting ramp for dynamic load/unload files |
US6510021B1 (en) * | 1996-06-03 | 2003-01-21 | Seagate Technology Llc | Mechanical isolation for a disc drive spindle motor |
US5834084A (en) * | 1996-06-25 | 1998-11-10 | Seagate Technology, Inc. | Disc drive flex assembly having a low particulating circuit board |
US5870247A (en) * | 1996-11-12 | 1999-02-09 | International Business Machines Corporation | Extender frame for cooling a disk drive |
US5875074A (en) * | 1997-04-18 | 1999-02-23 | Quinta Corporation | Adjustable head loading apparatus |
US5966271A (en) * | 1997-04-30 | 1999-10-12 | Seagate Technology, Inc. | Apparatus for assembling a magnet and backiron for a voice coil motor |
JPH10334642A (en) * | 1997-05-30 | 1998-12-18 | Fujitsu Ltd | Disk device |
US6021041A (en) * | 1997-06-09 | 2000-02-01 | Dell U.S.A., L.P | Tuned shock absorbing system for portable computer hard disc drives |
US5956203A (en) * | 1997-08-26 | 1999-09-21 | International Business Machines Corporation | Disk drive having an insert with a channel for directing air flow to a rotary actuator voicecoil |
US6278574B1 (en) * | 1998-03-20 | 2001-08-21 | Maki Wakita | Data storage device having a single-piece integral frame |
DE69915193T2 (en) * | 1998-03-20 | 2004-09-16 | Citizen Watch Co., Ltd., Nishitokyo | MAGNETIC RECORDING DEVICE |
US6252745B1 (en) | 1998-07-13 | 2001-06-26 | Seagate Technology Llc | Latch and linear crash stop for a disc drive actuator arm |
US6293029B1 (en) * | 1998-08-27 | 2001-09-25 | Seagate Technology Llc | Measurement instrument for components of a voice coil motor |
KR100333329B1 (en) * | 1998-09-19 | 2002-09-25 | 삼성전자 주식회사 | Apparatus and method for assemblying base/main board assembly in hard disk drive |
US6762906B1 (en) | 1998-10-30 | 2004-07-13 | Iomega Corporation | Disk drive for removable disk cartridges and receivable into a PCMCIA port of a computer |
US6921999B1 (en) * | 1999-01-21 | 2005-07-26 | Stridsberg Innovation Ab | Electric motor |
US6735043B2 (en) | 1999-05-07 | 2004-05-11 | Seagate Technology Llc | Disc drive protective cover to improve shock robustness |
US6214070B1 (en) | 1999-07-19 | 2001-04-10 | Maxtor Corporation | Disk drive filter |
US6317402B1 (en) * | 1999-11-23 | 2001-11-13 | Behavior Tech Computer Corporation | Disk tray of optic disk drive having pressure balance device |
JP3727209B2 (en) | 1999-12-09 | 2005-12-14 | 富士通株式会社 | Magnetic disk unit |
JP2001229651A (en) * | 2000-02-15 | 2001-08-24 | Kokoku Intech Co Ltd | Cover for hard disk device |
JP3844638B2 (en) | 2000-05-18 | 2006-11-15 | Tdk株式会社 | Magnetic disk drive and manufacturing method thereof |
JP2004506292A (en) * | 2000-08-16 | 2004-02-26 | ドナルドソン カンパニー,インコーポレイティド | Filtration assembly for disk drive and its use |
JP2002109856A (en) * | 2000-10-02 | 2002-04-12 | Teac Corp | Disk device |
JP2002136092A (en) * | 2000-10-27 | 2002-05-10 | Matsushita Electric Ind Co Ltd | Voice coil motor |
US6954328B2 (en) | 2001-02-09 | 2005-10-11 | Seagate Technology, Llc | Multi-layer housing structure with tuned layers using hypothetical modeling |
US6961207B2 (en) * | 2001-05-10 | 2005-11-01 | Samsung Electronics Co., Ltd. | Apparatus and method for dampening disk vibration in storage devices |
US7038887B2 (en) * | 2002-05-03 | 2006-05-02 | Seagate Technology Llc | Overmolded crash stop for a disc drive |
SG114578A1 (en) * | 2002-05-23 | 2005-09-28 | Seagate Technology Llc | Fluid-borne contaminant protection using a filter assembly with a leading edge guide surface |
US20030218829A1 (en) * | 2002-05-23 | 2003-11-27 | Seagate Technology Llc | Fluid-borne contaminant protection using a filter assembly with a leading edge guide surface |
US6822824B2 (en) | 2002-06-07 | 2004-11-23 | Seagate Technology Llc | Flex circuit bracket which establishes a diffusion path for a data storage device housing |
US6826009B1 (en) * | 2002-08-30 | 2004-11-30 | General Electric Capital Corporation | Disk drive including a filter element disposed along a disk surface for filtering disk rotation induced airflow |
JP4209252B2 (en) * | 2003-05-19 | 2009-01-14 | 株式会社ストレージ・ビジョン | Recording device |
US7815715B2 (en) * | 2003-10-30 | 2010-10-19 | Seagate Technology Llc | Mounting configuration for a filtration canister |
US20050222801A1 (en) * | 2004-04-06 | 2005-10-06 | Thomas Wulff | System and method for monitoring a mobile computing product/arrangement |
KR100585149B1 (en) * | 2004-06-24 | 2006-05-30 | 삼성전자주식회사 | Housing of hard disk drive having a damping plate |
KR100594285B1 (en) * | 2004-07-03 | 2006-06-30 | 삼성전자주식회사 | Housing of hard disk drive adopting a damping member having an open-cell structure |
JP2006216157A (en) * | 2005-02-03 | 2006-08-17 | Hitachi Global Storage Technologies Netherlands Bv | Magnetic disk device |
US7822513B2 (en) * | 2005-07-27 | 2010-10-26 | Symbol Technologies, Inc. | System and method for monitoring a mobile computing product/arrangement |
US7433191B2 (en) * | 2005-09-30 | 2008-10-07 | Apple Inc. | Thermal contact arrangement |
US7616401B2 (en) * | 2005-09-30 | 2009-11-10 | Seagate Technology Llc | Metal injection molded base for a data storage system |
US7440281B2 (en) * | 2006-02-01 | 2008-10-21 | Apple Inc. | Thermal interface apparatus |
JP2007272969A (en) * | 2006-03-30 | 2007-10-18 | Hitachi Global Storage Technologies Netherlands Bv | Magnetic disk device |
US8594742B2 (en) * | 2006-06-21 | 2013-11-26 | Symbol Technologies, Inc. | System and method for monitoring a mobile device |
US20070297028A1 (en) * | 2006-06-21 | 2007-12-27 | Thomas Wulff | System and device for monitoring a computing device |
US8004797B2 (en) * | 2007-04-27 | 2011-08-23 | Hewlett-Packard Development Company, L.P. | Tape drive with a clamping mechanism coupled to a flexible circuit |
CN101465143B (en) * | 2007-12-19 | 2010-11-10 | 鸿富锦精密工业(深圳)有限公司 | CD-disc read-write equipment |
US8525840B2 (en) * | 2008-05-15 | 2013-09-03 | Apple Inc. | Thermal management of graphics processing units |
US9063713B2 (en) * | 2008-10-28 | 2015-06-23 | Apple Inc. | Graphics controllers with increased thermal management granularity |
US8477490B2 (en) | 2011-05-02 | 2013-07-02 | Apple Inc. | Cooling system for mobile electronic devices |
JP2013123367A (en) * | 2011-12-12 | 2013-06-20 | Lg Innotek Co Ltd | Spindle motor |
US8553357B1 (en) * | 2012-03-26 | 2013-10-08 | Amazon Technologies, Inc. | Cooling of hard disk drives with separate mechanical module and drive control module |
US8908326B1 (en) | 2012-03-26 | 2014-12-09 | Amazon Technologies, Inc. | Hard disk drive mechanical modules with common controller |
US8929024B1 (en) | 2012-03-26 | 2015-01-06 | Amazon Technologies, Inc. | Hard disk drive assembly with field-separable mechanical module and drive control |
KR101342290B1 (en) * | 2012-06-28 | 2013-12-16 | 엘지이노텍 주식회사 | Motor |
US9148036B2 (en) * | 2012-07-27 | 2015-09-29 | Nidec Corporation | Base member of a motor which includes specific surface structure |
US9125299B2 (en) | 2012-12-06 | 2015-09-01 | Apple Inc. | Cooling for electronic components |
US8896964B1 (en) | 2013-05-16 | 2014-11-25 | Seagate Technology Llc | Enlarged substrate for magnetic recording medium |
US9223167B2 (en) | 2013-06-26 | 2015-12-29 | Apple Inc. | Liquid crystal switching barrier thermal control |
US9389029B2 (en) | 2013-09-30 | 2016-07-12 | Apple Inc. | Heat transfer structure |
US9674986B2 (en) | 2015-08-03 | 2017-06-06 | Apple Inc. | Parallel heat spreader |
US20230225074A1 (en) * | 2022-01-12 | 2023-07-13 | Seagate Technology Llc | Data storage devices with air movers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661735A (en) * | 1984-09-19 | 1987-04-28 | Victor Company Of Japan, Limited | Arrangement for mounting a plurality of motors |
US4712146A (en) * | 1985-06-04 | 1987-12-08 | Plus Development Corporation | Thin and compact micro-Winchester head and disk assembly |
WO1988009551A1 (en) * | 1987-05-29 | 1988-12-01 | Conner Peripherals, Inc. | Disk drive architecture |
US4825316A (en) * | 1986-07-17 | 1989-04-25 | Victor Company Of Japan, Limited | Thermal deformation controlled enclosure for a disk drive system |
WO1989008313A1 (en) * | 1988-03-01 | 1989-09-08 | Prairietek Corporation | Disk drive apparatus |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2024495B (en) * | 1978-05-16 | 1982-12-22 | Burroughs Corp | Record-disc cover having air filtration section |
US4346416A (en) * | 1980-02-29 | 1982-08-24 | Digital Equipment Corporation | Rotary actuator assembly for disk drive head positioner |
US4628384A (en) * | 1983-08-26 | 1986-12-09 | Ferrofluidics Corporation | Bearing assembly with integrated ferrofluid seal |
JPH065939B2 (en) * | 1984-05-21 | 1994-01-19 | ソニー株式会社 | Magnetic disc identification circuit |
US4620248A (en) * | 1984-09-04 | 1986-10-28 | Magnetic Peripherals Inc. | Apparatus for controlling humidity in a disk drive |
US4772974A (en) * | 1985-06-04 | 1988-09-20 | Plus Development Corporation | Compact head and disk assembly |
US4751594A (en) * | 1986-05-22 | 1988-06-14 | Magnetic Peripherals Inc. | Low diffusion disk drive breather vent |
JPS6391893A (en) * | 1986-10-06 | 1988-04-22 | Nippon Telegr & Teleph Corp <Ntt> | Moisture absorption mechanism for sealed type magnetic disk device |
DE3883298T2 (en) * | 1987-06-08 | 1994-03-10 | Mitsubishi Electric Corp | Device for controlling the moisture content. |
GB2214696A (en) * | 1988-01-19 | 1989-09-06 | Mitsubishi Electric Corp | Controlling humidity in magnetic disc apparatus |
US4965684A (en) * | 1988-01-25 | 1990-10-23 | Conner Peripherals, Inc. | Low height disk drive |
US4969061A (en) * | 1989-01-23 | 1990-11-06 | Iomega Corporation | Particulate removing means for cartridges |
US5025335B1 (en) * | 1989-07-31 | 1995-12-26 | Conner Peripherals Inc | Architecture for 2 1/2 inch diameter single disk drive |
US5235482A (en) * | 1989-11-09 | 1993-08-10 | Rodime Plc | Magnetic disk drive incorporating a mechanically damped base |
US5034837A (en) * | 1989-11-09 | 1991-07-23 | Rodime Plc | Magnetic disk drive incorporating a magnetic actuator lock and a very small form factor |
-
1989
- 1989-11-06 US US07/432,664 patent/US5025336A/en not_active Expired - Lifetime
- 1989-12-14 TW TW078109703A patent/TW218047B/zh active
-
1990
- 1990-11-05 AT AT90312087T patent/ATE150894T1/en not_active IP Right Cessation
- 1990-11-05 EP EP90312087A patent/EP0427490B1/en not_active Expired - Lifetime
- 1990-11-05 DE DE69030297T patent/DE69030297T2/en not_active Expired - Fee Related
- 1990-11-06 JP JP2300939A patent/JPH03207076A/en active Pending
- 1990-11-06 KR KR1019900017860A patent/KR100235264B1/en not_active IP Right Cessation
-
1993
- 1993-12-02 US US08/161,684 patent/US5463507A/en not_active Expired - Fee Related
-
1995
- 1995-02-22 US US08/394,550 patent/US5537270A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661735A (en) * | 1984-09-19 | 1987-04-28 | Victor Company Of Japan, Limited | Arrangement for mounting a plurality of motors |
US4712146A (en) * | 1985-06-04 | 1987-12-08 | Plus Development Corporation | Thin and compact micro-Winchester head and disk assembly |
US4825316A (en) * | 1986-07-17 | 1989-04-25 | Victor Company Of Japan, Limited | Thermal deformation controlled enclosure for a disk drive system |
WO1988009551A1 (en) * | 1987-05-29 | 1988-12-01 | Conner Peripherals, Inc. | Disk drive architecture |
WO1989008313A1 (en) * | 1988-03-01 | 1989-09-08 | Prairietek Corporation | Disk drive apparatus |
Non-Patent Citations (3)
Title |
---|
COMPUTER TECHNOLOGY REVIEW. no. 16, 1988, LOS ANGELES US pages 36 - 37; JAMES H. MOREHOUSE: 'Dynamic Head Loading, In-Hub Motor Shrink Hard Disk Drive' * |
INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICSJune 1989, ROSEMONT, US pages 232 - 233; KAORU MATSUOKA: 'Automatic design method of brushless dc motors for VCRs' * |
MACHINE DESIGN. vol. 58, no. 2, 23 January 1986, CLEVELAND US pages 18 - 26; BEN H. CARLISLE: 'Rare-Earth Motors Shed Their Exotic Image' * |
Cited By (67)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5469421A (en) * | 1988-09-05 | 1995-11-21 | Seiko Epson Corporation | Floppy disk drive device |
US5610782A (en) * | 1988-09-05 | 1997-03-11 | Seiko Epson Corporation | Floppy disk drive device |
USRE37426E1 (en) | 1988-09-05 | 2001-10-30 | Seiko Epson Corporation | Floppy disk dive device |
USRE37503E1 (en) | 1988-09-05 | 2002-01-08 | Seiko Epson Corporation | Floppy disk drive device |
US5796557A (en) * | 1990-11-09 | 1998-08-18 | Seagate Technology, Inc. | Disk drive architecture including a current-induced latching device |
EP0556287A1 (en) * | 1990-11-09 | 1993-08-25 | Conner Peripherals, Inc. | High performance disk drive architecture |
EP0556287A4 (en) * | 1990-11-09 | 1993-09-08 | Conner Peripherals, Inc. | High performance disk drive architecture |
GB2252660A (en) * | 1990-11-29 | 1992-08-12 | Mitsubishi Electric Corp | Electronic parts and connector mounting structure of disk unit |
US5304878A (en) * | 1990-11-29 | 1994-04-19 | Mitsubishi Denki Kabushiki Kaisha | Electronic parts and connector mounting structure of disk unit |
GB2252660B (en) * | 1990-11-29 | 1994-11-02 | Mitsubishi Electric Corp | Electronic parts and connector mounting structure of disk unit |
US5969907A (en) * | 1991-06-10 | 1999-10-19 | Fujitsu Limited | Magnetic disk drive |
EP0766233A3 (en) * | 1991-06-10 | 1998-01-07 | Fujitsu Limited | Magnetic disk drive |
EP0526703A3 (en) * | 1991-07-29 | 1993-03-31 | Areal Technology, Inc. | Compact disk drive useful for laptop computer |
EP0526703A2 (en) * | 1991-07-29 | 1993-02-10 | Areal Technology, Inc. | Compact disk drive useful for laptop computer |
EP0534745A3 (en) * | 1991-09-24 | 1993-09-29 | Kalok Corporation | High capacity, low profile disk drive system |
EP0794533A2 (en) * | 1991-09-24 | 1997-09-10 | Kalok Corporation | High capacity, low profile disk drive system |
EP0794533A3 (en) * | 1991-09-24 | 1998-03-18 | Kalok Corporation | High capacity, low profile disk drive system |
EP0534745A2 (en) * | 1991-09-24 | 1993-03-31 | Kalok Corporation | High capacity, low profile disk drive system |
EP0537707A3 (en) * | 1991-10-15 | 1993-09-29 | Areal Technology, Inc. | Assembly of compact disk drive |
EP0537707A2 (en) * | 1991-10-15 | 1993-04-21 | Areal Technology, Inc. | Assembly of compact disk drive |
US5657182A (en) * | 1991-11-14 | 1997-08-12 | Matsushita Electric Industrial Co., Ltd. | Casing of a magnetic recording and reproducing apparatus having rails for detachable mounting to a computer |
EP0542183A3 (en) * | 1991-11-14 | 1993-06-30 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproducing apparatus |
EP0542183A2 (en) * | 1991-11-14 | 1993-05-19 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproducing apparatus |
EP0918327A1 (en) * | 1991-11-22 | 1999-05-26 | Fujitsu Limited | Disk drive |
US6025973A (en) * | 1991-11-22 | 2000-02-15 | Fujitsu Limited | Construction for attaching a disk in a disk drive |
US6016237A (en) * | 1991-11-22 | 2000-01-18 | Fujitsu Limited | Shaft construction of a disk drive |
EP0569593A1 (en) * | 1991-11-22 | 1993-11-18 | Fujitsu Limited | Disc device |
EP0569593A4 (en) * | 1991-11-22 | 1994-08-31 | Fujitsu Limited | Disc device |
US5880904A (en) * | 1991-11-22 | 1999-03-09 | Fujitsu Limited | Disk drive having a thickness equal to an IC memory card |
EP0862168A2 (en) * | 1992-01-21 | 1998-09-02 | Fujitsu Limited | Optical disk apparatus having a reduced size |
EP0862168A3 (en) * | 1992-01-21 | 2001-05-16 | Fujitsu Limited | Optical disk apparatus having a reduced size |
EP0553551A3 (en) * | 1992-01-21 | 1994-10-19 | Fujitsu Ltd | Optical disk apparatus having a reduced size |
US6052357A (en) * | 1992-01-21 | 2000-04-18 | Fujitsu Limited | Compact optical disk apparatus having a swing-motion optical head |
EP0553551A2 (en) * | 1992-01-21 | 1993-08-04 | Fujitsu Limited | Optical disk apparatus having a reduced size |
EP0671044A4 (en) * | 1992-10-14 | 1996-05-29 | Maxtor Corp | 10 millimeter form factor for a 2.5 inch disk drive. |
EP0671044A1 (en) * | 1992-10-14 | 1995-09-13 | Maxtor Corporation | 10 millimeter form factor for a 2.5 inch disk drive |
US5608592A (en) * | 1992-10-29 | 1997-03-04 | Fujitsu Limited | Head actuator |
EP0597189A3 (en) * | 1992-11-13 | 1994-09-14 | Hewlett Packard Co | Low profile rotary actuator structure for a hard disk drive. |
EP0597189A2 (en) * | 1992-11-13 | 1994-05-18 | Hewlett-Packard Company | Low profile rotary actuator structure for a hard disk drive |
EP0738417A1 (en) * | 1992-11-13 | 1996-10-23 | Maxtor Corporation | Air filter and circulation system for a hard disk drive |
EP0738417A4 (en) * | 1992-11-13 | 1996-03-15 | Maxtor Corp | Air filter and circulation system for a hard disk drive |
EP0602677A2 (en) * | 1992-12-18 | 1994-06-22 | Sony Corporation | Magnet-optical disc drive device |
EP0602677A3 (en) * | 1992-12-18 | 1995-02-01 | Sony Corp | Magnet-optical disc drive device. |
EP0712129A4 (en) * | 1993-07-30 | 1996-12-27 | Citizen Watch Co Ltd | Magnetic disc device |
US5671103A (en) * | 1993-07-30 | 1997-09-23 | Citizen Watch Co., Ltd. | Sealed, dust-proof magnetic disk drive |
EP0712129A1 (en) * | 1993-07-30 | 1996-05-15 | Citizen Watch Co. Ltd. | Magnetic disc device |
DE4429900A1 (en) * | 1993-08-30 | 1995-03-09 | Fujitsu Ltd | Magnetic-disk device |
US5673159A (en) * | 1993-08-30 | 1997-09-30 | Fujitsu Limited | Magnetic disk apparatus |
DE4429900C2 (en) * | 1993-08-30 | 2000-05-25 | Fujitsu Ltd | Magnetic disk device |
US6064546A (en) * | 1994-04-21 | 2000-05-16 | Hitachi, Ltd. | Magnetic storage apparatus |
EP0678855A1 (en) * | 1994-04-21 | 1995-10-25 | Hitachi, Ltd. | Magnetic storage apparatus |
US6452758B2 (en) | 1994-04-21 | 2002-09-17 | Hitachi, Ltd. | Magnetic storage apparatus |
US5615068A (en) * | 1994-08-01 | 1997-03-25 | Hitachi, Ltd. | Head locating actuator having reduced susceptibility to dynamic reaction force effects, and a disk apparatus incorporating the same |
EP0696030A3 (en) * | 1994-08-01 | 1996-06-26 | Hitachi Ltd | Head locating actuator and disk apparatus incorporating the same |
US6125016A (en) * | 1994-08-02 | 2000-09-26 | Seagate Technology Llc | Disk drive including embedded voice coil magnet plates |
WO1996004656A1 (en) * | 1994-08-02 | 1996-02-15 | Conner Peripherals, Inc. | Disk drive including embedded voice coil magnet plates |
WO1996014637A1 (en) * | 1994-11-08 | 1996-05-17 | Conner Peripherals, Inc. | Disk drive including multi-stage environmental diffusion buffer |
CN1085381C (en) * | 1994-11-08 | 2002-05-22 | 西加特技术有限责任公司 | Disk drive including multi-stage environmental diffusion buffer |
KR100391346B1 (en) * | 1994-11-08 | 2003-11-14 | 시게이트 테크놀로지 엘엘씨 | Disk drive including multi-stage environmental diffusion buffer |
US6143058A (en) * | 1997-03-17 | 2000-11-07 | Donaldson Company, Inc. | Adsorbent construction and method |
WO1998041989A1 (en) * | 1997-03-17 | 1998-09-24 | Donaldson Company, Inc. | Adsorbent construction and method |
US5876487A (en) * | 1997-03-17 | 1999-03-02 | Donaldson Company, Inc. | Adsorbent construction; and, method |
US6146446A (en) * | 1998-10-08 | 2000-11-14 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
US6168651B1 (en) | 1998-10-08 | 2001-01-02 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
US6726745B2 (en) | 1998-10-08 | 2004-04-27 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
SG98402A1 (en) * | 1999-06-04 | 2003-09-19 | Sony Corp | Disc drive and optical disc drive |
US7120920B1 (en) | 1999-06-04 | 2006-10-10 | Sony Corporation | Disc drive and optical disc drive |
Also Published As
Publication number | Publication date |
---|---|
ATE150894T1 (en) | 1997-04-15 |
EP0427490A3 (en) | 1992-07-08 |
DE69030297T2 (en) | 1997-09-25 |
TW218047B (en) | 1993-12-21 |
EP0427490B1 (en) | 1997-03-26 |
JPH03207076A (en) | 1991-09-10 |
US5463507A (en) | 1995-10-31 |
US5025336A (en) | 1991-06-18 |
KR910010452A (en) | 1991-06-29 |
KR100235264B1 (en) | 1999-12-15 |
US5537270A (en) | 1996-07-16 |
DE69030297D1 (en) | 1997-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0427490B1 (en) | Disk drive apparatus | |
US5666239A (en) | Laminated base deck for a disc drive | |
US5570250A (en) | Disk drive head disk assembly actuator mount mechanism | |
US4772974A (en) | Compact head and disk assembly | |
US4553183A (en) | Memory storage apparatus having improved housing and base plate arrangement | |
US4712146A (en) | Thin and compact micro-Winchester head and disk assembly | |
US5352947A (en) | Spindle motor assembly for disc drives | |
EP0447412B1 (en) | Method and apparatus for improved thermal isolation and stability of disk drives | |
US6097608A (en) | Disk drive vibration isolation using diaphragm isolators | |
JP3051759B2 (en) | Low noise rotary motor for disk drive | |
US5914836A (en) | Cantilevered support for the magnetic circuit of a disc drive voice coil motor | |
US5796557A (en) | Disk drive architecture including a current-induced latching device | |
JPH08501650A (en) | Low height disk drive with 2 1/2 inch form factor | |
US6654208B2 (en) | Reduced inertia actuator pivot assembly | |
US6603633B2 (en) | Parallel spring design for acoustic damping of a disc drive | |
US5193037A (en) | Compact disk drive for use with laptop computer | |
US20060268451A1 (en) | Disk device | |
WO1993006600A1 (en) | Architecture for low-profile rigid disk drive | |
US5790344A (en) | Base casting/cover for separating pack bounce and spindle tilt modes in a magnetic storage system | |
US6744606B2 (en) | Dual plane actuator | |
US7583471B2 (en) | Motor assembly for a small sized data storage system | |
KR960001250B1 (en) | Magnetic disk drive | |
JP3688445B2 (en) | Magnetic disk unit | |
EP0673035A2 (en) | Magnetic disk drive | |
JPH08102181A (en) | Magnetic disk device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19921207 |
|
17Q | First examination report despatched |
Effective date: 19940309 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ALPS ELECTRIC CO., LTD. Owner name: CONNER PERIPHERALS, INC. |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19970326 Ref country code: LI Effective date: 19970326 Ref country code: CH Effective date: 19970326 Ref country code: BE Effective date: 19970326 Ref country code: FR Effective date: 19970326 Ref country code: AT Effective date: 19970326 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970326 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19970326 Ref country code: DK Effective date: 19970326 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970326 |
|
REF | Corresponds to: |
Ref document number: 150894 Country of ref document: AT Date of ref document: 19970415 Kind code of ref document: T |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69030297 Country of ref document: DE Date of ref document: 19970430 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19970626 |
|
EN | Fr: translation not filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19971105 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19991001 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19991025 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001105 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20001105 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010801 |